531 lines
15 KiB
JavaScript
531 lines
15 KiB
JavaScript
/**
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* Package: svedit.select
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*
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* Licensed under the Apache License, Version 2
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*
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* Copyright(c) 2010 Alexis Deveria
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* Copyright(c) 2010 Jeff Schiller
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*/
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// Dependencies:
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// 1) jQuery
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// 2) browsersupport.js
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// 3) math.js
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// 4) svgutils.js
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(function() {
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if (!window.svgedit) {
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window.svgedit = {};
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}
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if (!svgedit.select) {
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svgedit.select = {};
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}
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var svgFactory_;
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var config_;
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var selectorManager_; // A Singleton
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// Class: svgedit.select.Selector
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// Private class for DOM element selection boxes
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//
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// Parameters:
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// id - integer to internally indentify the selector
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// elem - DOM element associated with this selector
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svgedit.select.Selector = function(id, elem) {
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// this is the selector's unique number
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this.id = id;
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// this holds a reference to the element for which this selector is being used
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this.selectedElement = elem;
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// this is a flag used internally to track whether the selector is being used or not
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this.locked = true;
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// this holds a reference to the <g> element that holds all visual elements of the selector
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this.selectorGroup = svgFactory_.createSVGElement({
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'element': 'g',
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'attr': {'id': ('selectorGroup' + this.id)}
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});
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// this holds a reference to the path rect
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this.selectorRect = this.selectorGroup.appendChild(
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svgFactory_.createSVGElement({
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'element': 'path',
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'attr': {
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'id': ('selectedBox' + this.id),
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'fill': 'none',
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'stroke': '#22C',
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'stroke-width': '1',
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'stroke-dasharray': '5,5',
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// need to specify this so that the rect is not selectable
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'style': 'pointer-events:none'
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}
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})
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);
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// this holds a reference to the grip coordinates for this selector
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this.gripCoords = {
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'nw': null,
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'n' : null,
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'ne': null,
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'e' : null,
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'se': null,
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's' : null,
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'sw': null,
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'w' : null
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};
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this.reset(this.selectedElement);
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};
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// Function: svgedit.select.Selector.reset
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// Used to reset the id and element that the selector is attached to
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//
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// Parameters:
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// e - DOM element associated with this selector
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svgedit.select.Selector.prototype.reset = function(e) {
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this.locked = true;
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this.selectedElement = e;
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this.resize();
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this.selectorGroup.setAttribute('display', 'inline');
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};
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// Function: svgedit.select.Selector.updateGripCursors
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// Updates cursors for corner grips on rotation so arrows point the right way
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//
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// Parameters:
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// angle - Float indicating current rotation angle in degrees
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svgedit.select.Selector.prototype.updateGripCursors = function(angle) {
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var dir_arr = [];
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var steps = Math.round(angle / 45);
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if(steps < 0) steps += 8;
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for (var dir in selectorManager_.selectorGrips) {
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dir_arr.push(dir);
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}
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while(steps > 0) {
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dir_arr.push(dir_arr.shift());
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steps--;
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}
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var i = 0;
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for (var dir in selectorManager_.selectorGrips) {
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selectorManager_.selectorGrips[dir].setAttribute('style', ('cursor:' + dir_arr[i] + '-resize'));
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i++;
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};
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};
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// Function: svgedit.select.Selector.showGrips
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// Show the resize grips of this selector
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//
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// Parameters:
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// show - boolean indicating whether grips should be shown or not
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svgedit.select.Selector.prototype.showGrips = function(show) {
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// TODO: use suspendRedraw() here
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var bShow = show ? 'inline' : 'none';
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selectorManager_.selectorGripsGroup.setAttribute('display', bShow);
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var elem = this.selectedElement;
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this.hasGrips = show;
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if(elem && show) {
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this.selectorGroup.appendChild(selectorManager_.selectorGripsGroup);
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this.updateGripCursors(svgedit.utilities.getRotationAngle(elem));
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}
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};
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// Function: svgedit.select.Selector.resize
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// Updates the selector to match the element's size
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svgedit.select.Selector.prototype.resize = function() {
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var selectedBox = this.selectorRect,
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mgr = selectorManager_,
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selectedGrips = mgr.selectorGrips,
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selected = this.selectedElement,
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sw = selected.getAttribute('stroke-width'),
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current_zoom = svgFactory_.currentZoom();
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var offset = 1/current_zoom;
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if (selected.getAttribute('stroke') !== 'none' && !isNaN(sw)) {
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offset += (sw/2);
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}
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var tagName = selected.tagName;
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if (tagName === 'text') {
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offset += 2/current_zoom;
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}
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// loop and transform our bounding box until we reach our first rotation
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var tlist = svgedit.transformlist.getTransformList(selected);
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var m = svgedit.math.transformListToTransform(tlist).matrix;
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// This should probably be handled somewhere else, but for now
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// it keeps the selection box correctly positioned when zoomed
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m.e *= current_zoom;
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m.f *= current_zoom;
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var bbox = svgedit.utilities.getBBox(selected);
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if(tagName === 'g' && !$.data(selected, 'gsvg')) {
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// The bbox for a group does not include stroke vals, so we
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// get the bbox based on its children.
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var stroked_bbox = svgFactory_.getStrokedBBox(selected.childNodes);
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if(stroked_bbox) {
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bbox = stroked_bbox;
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}
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}
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// apply the transforms
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var l=bbox.x, t=bbox.y, w=bbox.width, h=bbox.height,
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bbox = {x:l, y:t, width:w, height:h};
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// we need to handle temporary transforms too
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// if skewed, get its transformed box, then find its axis-aligned bbox
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//*
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offset *= current_zoom;
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var nbox = svgedit.math.transformBox(l*current_zoom, t*current_zoom, w*current_zoom, h*current_zoom, m),
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aabox = nbox.aabox,
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nbax = aabox.x - offset,
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nbay = aabox.y - offset,
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nbaw = aabox.width + (offset * 2),
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nbah = aabox.height + (offset * 2);
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// now if the shape is rotated, un-rotate it
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var cx = nbax + nbaw/2,
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cy = nbay + nbah/2;
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var angle = svgedit.utilities.getRotationAngle(selected);
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if (angle) {
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var rot = svgFactory_.svgRoot().createSVGTransform();
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rot.setRotate(-angle,cx,cy);
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var rotm = rot.matrix;
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nbox.tl = svgedit.math.transformPoint(nbox.tl.x,nbox.tl.y,rotm);
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nbox.tr = svgedit.math.transformPoint(nbox.tr.x,nbox.tr.y,rotm);
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nbox.bl = svgedit.math.transformPoint(nbox.bl.x,nbox.bl.y,rotm);
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nbox.br = svgedit.math.transformPoint(nbox.br.x,nbox.br.y,rotm);
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// calculate the axis-aligned bbox
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var tl = nbox.tl;
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var minx = tl.x,
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miny = tl.y,
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maxx = tl.x,
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maxy = tl.y;
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var Min = Math.min, Max = Math.max;
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minx = Min(minx, Min(nbox.tr.x, Min(nbox.bl.x, nbox.br.x) ) ) - offset;
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miny = Min(miny, Min(nbox.tr.y, Min(nbox.bl.y, nbox.br.y) ) ) - offset;
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maxx = Max(maxx, Max(nbox.tr.x, Max(nbox.bl.x, nbox.br.x) ) ) + offset;
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maxy = Max(maxy, Max(nbox.tr.y, Max(nbox.bl.y, nbox.br.y) ) ) + offset;
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nbax = minx;
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nbay = miny;
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nbaw = (maxx-minx);
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nbah = (maxy-miny);
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}
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var sr_handle = svgFactory_.svgRoot().suspendRedraw(100);
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var dstr = 'M' + nbax + ',' + nbay
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+ ' L' + (nbax+nbaw) + ',' + nbay
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+ ' ' + (nbax+nbaw) + ',' + (nbay+nbah)
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+ ' ' + nbax + ',' + (nbay+nbah) + 'z';
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selectedBox.setAttribute('d', dstr);
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var xform = angle ? 'rotate(' + [angle,cx,cy].join(',') + ')' : '';
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this.selectorGroup.setAttribute('transform', xform);
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// TODO(codedread): Is this if needed?
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// if(selected === selectedElements[0]) {
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this.gripCoords = {
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'nw': [nbax, nbay],
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'ne': [nbax+nbaw, nbay],
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'sw': [nbax, nbay+nbah],
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'se': [nbax+nbaw, nbay+nbah],
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'n': [nbax + (nbaw)/2, nbay],
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'w': [nbax, nbay + (nbah)/2],
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'e': [nbax + nbaw, nbay + (nbah)/2],
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's': [nbax + (nbaw)/2, nbay + nbah]
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};
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for(var dir in this.gripCoords) {
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var coords = this.gripCoords[dir];
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selectedGrips[dir].setAttribute('cx', coords[0]);
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selectedGrips[dir].setAttribute('cy', coords[1]);
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};
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// we want to go 20 pixels in the negative transformed y direction, ignoring scale
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mgr.rotateGripConnector.setAttribute('x1', nbax + (nbaw)/2);
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mgr.rotateGripConnector.setAttribute('y1', nbay);
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mgr.rotateGripConnector.setAttribute('x2', nbax + (nbaw)/2);
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mgr.rotateGripConnector.setAttribute('y2', nbay - 20);
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mgr.rotateGrip.setAttribute('cx', nbax + (nbaw)/2);
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mgr.rotateGrip.setAttribute('cy', nbay - 20);
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// }
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svgFactory_.svgRoot().unsuspendRedraw(sr_handle);
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};
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// Class: svgedit.select.SelectorManager
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svgedit.select.SelectorManager = function() {
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// this will hold the <g> element that contains all selector rects/grips
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this.selectorParentGroup = null;
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// this is a special rect that is used for multi-select
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this.rubberBandBox = null;
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// this will hold objects of type svgedit.select.Selector (see above)
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this.selectors = [];
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// this holds a map of SVG elements to their Selector object
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this.selectorMap = {};
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// this holds a reference to the grip elements
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this.selectorGrips = {
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'nw': null,
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'n' : null,
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'ne': null,
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'e' : null,
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'se': null,
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's' : null,
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'sw': null,
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'w' : null
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};
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this.selectorGripsGroup = null;
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this.rotateGripConnector = null;
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this.rotateGrip = null;
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this.initGroup();
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};
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// Function: svgedit.select.SelectorManager.initGroup
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// Resets the parent selector group element
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svgedit.select.SelectorManager.prototype.initGroup = function() {
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// remove old selector parent group if it existed
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if (this.selectorParentGroup && this.selectorParentGroup.parentNode) {
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this.selectorParentGroup.parentNode.removeChild(this.selectorParentGroup);
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}
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// create parent selector group and add it to svgroot
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this.selectorParentGroup = svgFactory_.createSVGElement({
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'element': 'g',
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'attr': {'id': 'selectorParentGroup'}
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});
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this.selectorGripsGroup = svgFactory_.createSVGElement({
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'element': 'g',
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'attr': {'display': 'none'}
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});
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this.selectorParentGroup.appendChild(this.selectorGripsGroup);
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svgFactory_.svgRoot().appendChild(this.selectorParentGroup);
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this.selectorMap = {};
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this.selectors = [];
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this.rubberBandBox = null;
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// add the corner grips
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for (var dir in this.selectorGrips) {
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var grip = svgFactory_.createSVGElement({
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'element': 'circle',
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'attr': {
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'id': ('selectorGrip_resize_' + dir),
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'fill': '#22C',
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'r': 4,
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'style': ('cursor:' + dir + '-resize'),
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// This expands the mouse-able area of the grips making them
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// easier to grab with the mouse.
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// This works in Opera and WebKit, but does not work in Firefox
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// see https://bugzilla.mozilla.org/show_bug.cgi?id=500174
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'stroke-width': 2,
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'pointer-events': 'all'
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}
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});
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$.data(grip, 'dir', dir);
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$.data(grip, 'type', 'resize');
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this.selectorGrips[dir] = this.selectorGripsGroup.appendChild(grip);
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}
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// add rotator elems
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this.rotateGripConnector = this.selectorGripsGroup.appendChild(
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svgFactory_.createSVGElement({
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'element': 'line',
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'attr': {
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'id': ('selectorGrip_rotateconnector'),
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'stroke': '#22C',
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'stroke-width': '1'
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}
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})
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);
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this.rotateGrip = this.selectorGripsGroup.appendChild(
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svgFactory_.createSVGElement({
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'element': 'circle',
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'attr': {
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'id': 'selectorGrip_rotate',
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'fill': 'lime',
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'r': 4,
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'stroke': '#22C',
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'stroke-width': 2,
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'style': 'cursor:url(' + config_.imgPath + 'rotate.png) 12 12, auto;'
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}
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})
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);
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$.data(this.rotateGrip, 'type', 'rotate');
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if($('#canvasBackground').length) return;
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var dims = config_.dimensions;
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var canvasbg = svgFactory_.createSVGElement({
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'element': 'svg',
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'attr': {
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'id': 'canvasBackground',
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'width': dims[0],
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'height': dims[1],
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'x': 0,
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'y': 0,
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'overflow': (svgedit.browsersupport.isWebkit() ? 'none' : 'visible'), // Chrome 7 has a problem with this when zooming out
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'style': 'pointer-events:none'
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}
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});
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var rect = svgFactory_.createSVGElement({
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'element': 'rect',
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'attr': {
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'width': '100%',
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'height': '100%',
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'x': 0,
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'y': 0,
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'stroke-width': 1,
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'stroke': '#000',
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'fill': '#FFF',
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'style': 'pointer-events:none'
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}
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});
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// Both Firefox and WebKit are too slow with this filter region (especially at higher
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// zoom levels) and Opera has at least one bug
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// if (!svgedit.browsersupport.isOpera()) rect.setAttribute('filter', 'url(#canvashadow)');
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canvasbg.appendChild(rect);
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svgFactory_.svgRoot().insertBefore(canvasbg, svgFactory_.svgContent());
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};
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// Function: svgedit.select.SelectorManager.requestSelector
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// Returns the selector based on the given element
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//
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// Parameters:
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// elem - DOM element to get the selector for
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svgedit.select.SelectorManager.prototype.requestSelector = function(elem) {
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if (elem == null) return null;
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var N = this.selectors.length;
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// If we've already acquired one for this element, return it.
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if (typeof(this.selectorMap[elem.id]) == 'object') {
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this.selectorMap[elem.id].locked = true;
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return this.selectorMap[elem.id];
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}
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for (var i = 0; i < N; ++i) {
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if (this.selectors[i] && !this.selectors[i].locked) {
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this.selectors[i].locked = true;
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this.selectors[i].reset(elem);
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this.selectorMap[elem.id] = this.selectors[i];
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return this.selectors[i];
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}
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}
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// if we reached here, no available selectors were found, we create one
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this.selectors[N] = new svgedit.select.Selector(N, elem);
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this.selectorParentGroup.appendChild(this.selectors[N].selectorGroup);
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this.selectorMap[elem.id] = this.selectors[N];
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return this.selectors[N];
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};
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// Function: svgedit.select.SelectorManager.releaseSelector
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// Removes the selector of the given element (hides selection box)
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//
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// Parameters:
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// elem - DOM element to remove the selector for
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svgedit.select.SelectorManager.prototype.releaseSelector = function(elem) {
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if (elem == null) return;
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var N = this.selectors.length,
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sel = this.selectorMap[elem.id];
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for (var i = 0; i < N; ++i) {
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if (this.selectors[i] && this.selectors[i] == sel) {
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if (sel.locked == false) {
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// TODO(codedread): Ensure this exists in this module.
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console.log('WARNING! selector was released but was already unlocked');
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}
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delete this.selectorMap[elem.id];
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sel.locked = false;
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sel.selectedElement = null;
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sel.showGrips(false);
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// remove from DOM and store reference in JS but only if it exists in the DOM
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try {
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sel.selectorGroup.setAttribute('display', 'none');
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} catch(e) { }
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break;
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}
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}
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};
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// Function: svgedit.select.SelectorManager.getRubberBandBox
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// Returns the rubberBandBox DOM element. This is the rectangle drawn by the user for selecting/zooming
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svgedit.select.SelectorManager.prototype.getRubberBandBox = function() {
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if (!this.rubberBandBox) {
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this.rubberBandBox = this.selectorParentGroup.appendChild(
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svgFactory_.createSVGElement({
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'element': 'rect',
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'attr': {
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'id': 'selectorRubberBand',
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'fill': '#22C',
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'fill-opacity': 0.15,
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'stroke': '#22C',
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'stroke-width': 0.5,
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'display': 'none',
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'style': 'pointer-events:none'
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}
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})
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);
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}
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return this.rubberBandBox;
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};
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/**
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* Interface: svgedit.select.SVGFactory
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* An object that creates SVG elements for the canvas.
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*
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* interface svgedit.select.SVGFactory {
|
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* SVGElement createSVGElement(jsonMap);
|
|
* SVGSVGElement svgRoot();
|
|
* SVGSVGElement svgContent();
|
|
*
|
|
* Number currentZoom();
|
|
* Object getStrokedBBox(Element[]); // TODO(codedread): Remove when getStrokedBBox() has been put into svgutils.js
|
|
* }
|
|
*/
|
|
|
|
/**
|
|
* Function: svgedit.select.init()
|
|
* Initializes this module.
|
|
*
|
|
* Parameters:
|
|
* config - an object containing configurable parameters (imgPath)
|
|
* svgFactory - an object implementing the SVGFactory interface (see above).
|
|
*/
|
|
svgedit.select.init = function(config, svgFactory) {
|
|
config_ = config;
|
|
svgFactory_ = svgFactory;
|
|
selectorManager_ = new svgedit.select.SelectorManager();
|
|
};
|
|
|
|
/**
|
|
* Function: svgedit.select.getSelectorManager
|
|
*
|
|
* Returns:
|
|
* The SelectorManager instance.
|
|
*/
|
|
svgedit.select.getSelectorManager = function() {
|
|
return selectorManager_;
|
|
};
|
|
|
|
})(); |